Ive been having g some isduss for several mnts now. First it was thought I had a uti, & then a kidney infection. Ive been on 4 different antibiotics & the last one wored. Ive felt pretty good for a few weeks a now & thought it was all over with. I had seen my primary, 2er drs & went to a clinic during all that. Yesterday I started having really Y bad Bo ain on my left side today it in my back again. All the tests didnt show anything except the urine test. Should I goback in. Feeling frustrated cause nothing has been found.